Research On Key Technology And Application Of Establish Precise Time And Space Reference In Cyberspace

The cyberspace is a virtual logical space based on the physical interworking of various network devices and exchanged data through TCP/IP interconnection protocols.It does not have European geometric features.Time and space information is one of the basic attributes of various types of network information.The space and time information carried by network information cannot be fully utilized in the traditional Internet.This contradiction determines the inherent shortcomings of the traditional Internet in information routing,information traceability and tracking,and communication efficiency.At the application level,the network communication efficiency is not high,network congestion is likely to occur,network information security is poor,and information leakage is prone to occur.In view of the above problems,based on the previous research,this paper attempts to improve the network time synchronization accuracy and optimize information routing by adding Beidou high-precision positioning equipment on individual nodes without changing or minimally changing the existing physical conditions of the network.In a way,by adding technical methods such as time-space stamping of information packets,a precise space-time reference with European geometric features is established in the cyberspace,in order to open up a new idea to solve the security of cyberspace information.The main work of the paper is:1.In-depth study of the key to high-precision time synchronization on the Internet.It mainly uses Beidou precision single point positioning technology to introduce precise position information for key nodes of the network,and achieve high-precision time synchronization,realizing nanosecond time synchronization and centimeter-level device positioning accuracy of key nodes in the whole network.Lay the foundation for building a sophisticated space-time reference for cyberspace.2.A routing method based on spatial location information in cyberspace is proposed.The scheme of replacing the IP address in the traditional routing list with the precise spatial location information is proposed,and the optimal routing scheme based on "spatial address" in 2D and 3D modes is given.A method for predicting propagation delay of information network path through Euclidean distance is proposed.A dynamic analysis model of network load based on accurate space-time reference is proposed to provide reference for network load balancing and intelligent routing.3.A method of adding precise space-time stamp to network information is proposed,and label addition and path backtracking are implemented in a custom fat tree topology.The SDN-based network node simulation attack experiment shows that after the introduction of the precise space-time reference,the location and time period of the attacked node can be accurately found.It can effectively solve the problem that the regular network can only determine the time period of the attack and cannot determine the exact location of the attacked node.4.According to the theoretical method proposed in this paper,the simulation experiment of "network police" is built based on SDN.The delay and queuing delay environments for different routing processes,as well as experimental methods with different time and space requirements,prove that the overall improvement of network efficiency and security can be achieved only by fully considering the time and space requirements.